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Homework Help: A question about transformers

  1. Feb 28, 2010 #1
    This is a question written in my book, i tried to solve it but didnt work with me.

    1. The problem statement, all variables and given/known data
    A power station delivers a power of 150kW to small town at 15km from the station. Energy is transmitted by means of a transmission line of total resistance of 0.6 _()_ (ohm). The power factor is 1. Calculate the power lost as a result of this transmission at a voltage of 240V.
    It is in the lesson of transformers.

    2. Relevant equations

    3. The attempt at a solution
    I have the rule that the power lost is equal to : [R(line)*(P2)^2]/[(Veff)^2 * cos^2(phi2)
    or R(line) * (I2eff)^2 , but i dont have the I2eff and neither do i have P2 nor cos(phi)
    Last edited: Feb 28, 2010
  2. jcsd
  3. Feb 28, 2010 #2
    You need to show us your attempt at solving it so we can see what the problem is.
  4. Feb 28, 2010 #3
    ohh ok ill edit the first post
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